{
  "manageEntity": {
    "action": "Save",
    "entityId": "776341632",
    "entityType": "Track",
    "nonce": "0xd0798346f2451aff1d03d7dc79abae6a298af99dca8e290e04b2790312847d14",
    "signature": "0x88d4c7e228b8782e9099b747a1b4d87eb49dce1f33dcddf17f9139e190001a9d4ccd7d607f60b32b8ea2901a8e91b30cc1d298196613725b839756242d69e6451c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}